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<html>
<head>
<meta http-equiv="Content-Type" content="text/html";charset="utf-8">
<script type="text/javascript" src="jquery.js" ></script>
<script type="text/javascript">
var reg =/^[^_]/;
$(document).ready(function(){
var result=reg.exec("sadf_12");
alert(result);
alert("123");
$("p").html("12343");
};);
</script>
</head>
<body>
<p>adfdsf确定 </p>
</body>
</html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html";charset="utf-8">
<script type="text/javascript" src="jquery162.js" ></script>
<script type="text/javascript">
var reg =/^[^_]/;
$(document).ready(function(){
var result=reg.exec("sadf_12");
alert(result);
alert("123");
$("p").html("12343");
});
</script>
</head>
<body>
<p>adfdsf确定 </p>
</body>
</html>